/Engine/Source/Editor/SourceControlWindows/Public/SourceControlWindows.h
Callback forChoosePackagesToCheckIn(), continues to bring up UI once source control operations are complete
static void ChoosePackagesToCheckInCallback ( const [FSourceControlOperationRef](API\Developer\SourceControl\FSourceControlOperationRef) & InOperation, [ECommandResult::Type](API\Developer\SourceControl\ECommandResult__Type) InResult, FSourceControlWindowsOnCheckInComplete OnCompleteDelegate )